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Pilot-operated safety valve

2020-03-30View Original

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I found a pilot-operated safety valve in the company, and there are two things I don’t understand – it shows a mark of 4. What is the function of this pipeline? Marked 5, is this a check valve?
Reply #22020-03-30
1: Lower conduit of main valve 2: Upper conduit of main valve 3: Relief conduit of pilot valve 4: ? 5: ?
Reply #32020-03-31
I think it should be an amplifier, to increase the amount and speed of air intake
Reply #42020-11-01
Our pilot-operated safety valve isn’t that complicated

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